This Twitter user has uploaded a photograph appearing to show the Pakistan International Airways flight on the runway at Stansted Airport:
Essex Police has confirmed the plane diverted to Stansted Airport has now landed:
The Pakistan International Airlines plane that has been diverted from Manchester Airport to Stansted is carrying 297 passengers, Reuters reported.
The passenger flight (PIA709) that has been diverted is a Pakistan International Airways flight from Lahore in Pakistan to Manchester.
The Boeing 777-340ER, which is reportedly being diverted to Stansted Airport, has a capacity of 300-550 passengers.
Essex Police said its officers are responding after "an incident" occurred on a plane:
No further details were given.
The RAF has confirmed that one of its Typhoon jets was scrambled from RAF Coningsby in Lincolnshire in order to divert a passenger jet from Manchester Airport.
The aircraft, which is still in the air, is a Pakistan International Airlines passenger plane which was flying from Pakistan to Manchester, a Manchester Airport spokesman said.
A Pakistan International Airlines passenger flight has been diverted from Manchester Airport to Stansted. No reason has been given so far.
This flight tracker appears to show flight PIA709 moving dramatically off its course and heading south towards London.
An RAF Typhoon jet has been launched to investigate an incident involving a civilian aircraft in UK airspace, the Ministry of Defence said today.
Reports said the aircraft was a Pakistani passenger plane which had been diverted from Manchester to Stansted.